The Log

A giant, wooden log appears in front of you and rolls forwards 30ft before disappearing. Any creature hit by the log must make a Dexterity check equal to your spell DC. On a failed roll, the creature is knocked backwards 10ft and takes 2d4 force damage. On a successful throw, the creature takes no knockback and only 1d4 force damage. The damage increases by 1d4 every level for failed rolls, and 1d4 per 2 levels for successful rolls